Graphene has stood out in several areas of research. The objective of the present work was an unprecedented study in the production of a commercial wall latex paint with graphene oxide incorporation. The developed paint was assessed by performance tests according to the Brazilian standards, and the characterization was performed using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR), thermogravimetric analysis (TGA), and contact angle analysis. The results indicated that GO addition led to a better dispersion of the paint compound mixture even at very low concentrations (1% and 2%). For the dry and wet paint coverage performance tests, the results were superior, 2% and 9%, respectively, when compared with the paint without GO addition. All performance tests were in accordance with the requirements of the Brazilian standards. Thus, it was concluded that GO-containing paint could be a promising building material to be used as a paint additive obtaining superior properties.

One of the current challenges is to meet the demands for quality water since the contamination of bodies of water has been intensified in the last years with the increase in the use of pesticides. Therefore, finding a way to remove contamination by pesticides from water becomes a relevant work. In this study, it was presented the design and construction of a pilot-scale batch reactor prototype in order to remove the herbicide glyphosate from artificially contaminated water using a graphene hybrid composite with manganese ferrite, MnFe2O4-G, as an adsorbent. For the reactor design, it was initially required to know the steps necessary for the removal of the glyphosate from water, according to the chosen hybrid compound for the removal. After the steps were determinated, the components were selected to compose the treatment system. The layout of the prototype was defined and the positions of the elements and materials were chosen. Finally, the prototype was built and tested in the laboratory. The results showed that within 15 minutes the separation was completed and 70% of the adsorbent was recovered in the magnetic separator after 4 complete cycles of treatment. It was concluded that the prototype built fulfills the objective for which it was proposed, presenting the advantage of having all the steps of adsorption and desorption for glyphosate decontamination in the same equipment, being able to be expanded for use in effluent treatment plants.